Wrench.



No. 663,l63. A Patented Dec. 4, I900.

J. FATKIN.

WRENCH.

(Application flied Ayn 26, 1900.

NITED STATES PATENT FFICE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 663,163, dated December 4, 1900. Application filed April 25,1900. serial No- 14 .244. (No model.)

T0 at whom it may concern:

Be it known that 1, JAMES FATKIN, a citizen of the United States, residing at Gulch, in the county of Pitkin and State of'Qolorado, have invented certain new and useful Improvements in WVrenches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain new and useful improvements in wrenches for pipes, tubes, rods, nuts, and the like, and is designed to provide a construction of strength and stability,of a comparatively few number of parts, and which may be readily manipulated to grasp or release the object to which it is applied at the will of the user.

In the accompanying drawings, Figure represents a side elevation of a wrench embodying my improvements, the handle being shown as partly broken away. Fig. 2 represents a front elevation thereof, partlyin section. Fig. 3 represents in perspective the swinging nut upon which the movable jaw of the wrench is adapted to rock.

Similar letters of reference indicate similar parts through the several views.

Referring to the drawings, A indicates the wrench-handle provided with a fixed jaw arranged at a predetermined angle to the handle and having preferably a serrated face a. At a suitable location along the length of the handle are located the cheek-pieces b b,which serve as guides for the movable jaw of the wrench and as bearings for a nut having a limited rocking motion or swing, as will hereinafter more fully appear. The movable jaw has preferably an inclined clamping-face c and is provided with a longitudinal slot d, extending throughout its main body portion. The outer end 6 of the movable jaw is provided with a cylindrical aperture and is provided with a movable screw-threaded pin. f, which is adapted to engage within a groove g of a feed-screw B in such manner as to perunit the rotation of the screw, but to hold it against longitudinal movement relative to the movable jaw itself. The screw B is provided with a milled or knurled head C at one 1 end, and at the other end, h, is rounded, as shown, so as to fit within a recess provided for the purpose. The screwB passes through an internally screw threaded nut, (shown separately in Fig. 3,) wherein it indicates the in ternally-screw-threaded aperture of the nut. The nut is provided with trunnions or journals Z m at its opposite ends, one of said trunnions or journals being of lesser diameter than the other and the nutbeing flattened on both sides between the'said trunnions or journals. The cheek-pieces Z) Z) are provided with apertures or journal bearings corresponding to the diameter of the trunnions Z m, respectively, the arrangement being such as to permit the slight rocking movement desired for securely clamping or releasing the object grasped by the wrench.

The parts of the wrench may be assembled with great facility, this feature constituting a characteristic advantage of the construction shown. Thus, the movable jaw is first placed between the cheek-pieces, whereupon the not of Fig. 3 is dropped into place and necessarily adjusts itself in suchwise that aperture k. is in exact alinement with the aperture of the end 6 of the movable jaw. This alinement is insured by the fact that the sides of the nut are guided by the proximate sides of the slot d and that the shoulders TL exactly limit the manner in which the nut seats itself in the cheek-pieces. The aperture 76 being in the alinement referred to the operator thereupon inserts the screw B and locks the screw against longitudinal movement by inserting the screw-pin f.

The operation of the invention will be apparent. By turning the milled or knurled head 0 the movable jaw will be caused to advance until the object to be turned is clamped between the fixed face ct and the movable face 0. By turning the handle in the one direction or the other, astthe case may be,

the tube, rod, or other object is either firmly grasped by a slight inward rocking movement of the movable jaw or is instantly released by a correspondingly-slight outward rocking movement. thereof. In this movement the nut rocks upon its trunnions to the light extent desired, and the stress or strain put upon the parts is communicated to the screw B and through it to the nut and thence to the stout cheek-pieces of the stationary jaw.

Having thus described my invention, what I claim is- 1. A Wrench, comprising a handle having a fixed jaw, a longitudinally-slotted movable jaw adapted to travel toward and from the fixed jaw, a nut traversing the movable jaw transversely through the slot, said nut being provided with trunnions one of which is larger than the other, cheek-pieces projecting from the wrench-handle and having apertures or journal 'bearings corresponding respectively to the trunnions; and a feed-screw passing through said nut and receiving the thrust of the movable'jaw; substantially as described.

2. A wrench, comprisinga handle having a fixed jaw, a longitudinally-slotted movable sponding respectively to the trunnions, and

a feed-screw passing through said nut and receiving the thrust of the movable jaw; substantially as described;

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES FATKIN.

Witnesses:

' vSAM B. EUBANKS, W. M. DINKEL. 

